Internal-combustion engine.



E. L. KEMBTNBR. INTERNAL COMBUSTION ENGINE.

APPLICATION IILED OUTJ! 1912.

Paitented Dec.22,1914.

2 SHEETS-SHEET 1.

I v v 51 11mm or I EL zyPzwfzzzx- GNMMM -B. L. KEMPTNER. INTERNAL COMBUSTION ENGINE.

APPLIOATION PILE1 '0.0T.8', 1912. r

Patented Dec. 22, 1914.

2 SHEBTSSHEBT 2.

F i m w I a a E t 6 N e N z nwmengnwrs xnmrrnnn, or Museum-E, IowAj. i mrnmmn comeusrmii .nnqmnil To all 'wlmmit may concern.

- Muscatine, 'in thecountyfof Muscatine and State; of Iowa, have invented" certain' new and useful Improvements Inte'rnaleGom: bustio'n Engines; and]! do hereby declare the followingto be a full} clear," and exact descriptionof the inventionfsuchas will enable :others skilled in the art to which it appertains to, make and use the same, reference being had to the accompanying draw ings, and to the letters and figures offiref erence marked thereonywhich form part of this specification. 7

'This'in'vention relates to new' and iiseful improvements 1 in internal combustion engines and es eciall to an engine which n lay be readily converted froni'a two to a four cycle engine'or vice .versa, :thus making it' possible to adapt the-engine as a jfourflcycle' type on-good roads and "as a two cycle upon grades,-thereby increasing the power apprecia'bly.

1 :The invention consists furtherin an engine of this type whichwill be economical in working, making it possible to use high power'only-where necessary and consists in various details of construction and'coinbinw' tions and arrangements ofparts whibli will be hereinafter fully described, show'n'in' the, accompanying drawings and then specifi-r cally defined in the appended claims. y invention is illustrated-in the-accompanyigng'd-rawi'ngs, in which-:

Figure -1-is a vertical central sectional view-A through an engine made in accordance with myinvention'u 'Fig.'2is an enlarged detail' sectional view through one of 'the' sleeve' 40 valves -Fig. 3.i'sa sectional view on-line' 3-3 of Fig. 2, and Fig. 4} is a sectionalview on line4+4 of Fig.- 1.

-- the drawingsby letter, A d'esignatesa cy'l inder of-the conventional type of internal combustion engines-having a'piston B there;

vided in the upper portion of the-c linder and the two fuel admission ports 'andI lead through thelwater jacket of the-;cy'linl-.

fold, not shown,

Specification e: utterance.- t t 22, 1914, Application filed October a', 1912. rsergaritt. 24,602."

V f dertandeonimiimcate'with the interior there- I .Be-itknown that I, Ewmo L. KEMIfTIIEB, l a citizen'ofthe United 'States, residing-at of at 'rsuitabledocations. Positioned ad'acent to the cylinder is a valve casin'g N with f which the'two pipes H andI communicate,[ and and 'Oi-designate two ipes leading mto the -valve casing fat suita le locationspso preferably near? "e' opposite ends thereof, adapted to lead-from the intake of a mani- When the apparatus is adapted for operation as a four-cycle eng1ne,'the fuel enters the'pipe O in the direc-"ei tionof the arrowi'in' Fig. 1 and, -when adapt ed as'ra"two-cycle" engine, the fuel-enters th'rough'th'e pipe 0:

andmounted to reciprocateand' rotate with said rod' is asleeve 'valve J. The upper portion of the wall of the valve J is provided .with two oppositely-dis osd ports L which are adapted, when 'sai valve is in-certain positions, to register with the 'pipes H and 0' respectively. A" portion'lof the wall of the'valve is provided with two elongated po'rtsO", and L which areadapted to 'register with the ports I and 0' respectively as the sleeve -reciproca'tes and when operating as a two-cycle engine. A spring L is mounted about the upper portion of the rod Q and bears between the top of the sleeve piston'J-and a' plate "L having an aperture foggie reception of the upper end of the T0 Fixed" to the rod Q is a lever Q to which so a zfr'od Q, is adapted to be fastened, as

i shown in"Fig.4of the drawings, and which is provided for the urpose of rocking the piston 'valvexwhen it is desired to convert the apparatus from a: two to a four-cycle engine or vice versa. Reference now being bad to the 'detailsfof- It will be noted'that-the ports 0 and L in the valve J for "the two cycle arrangement are longer thanthe ports in the valve cage N and thus the .upward and downward 1100 movement of the val ve', when the engine is working in the two cygle,-does not prevent the intake of the chargeof ga's from'entering'thecrank case, and upper portion of the piston acts as a valve to'open the intake to thezexplosion chamber, a check valve'in= the manifold and the carbureter, not showinpreventing thecharge fromblowing back-out.

' sprocket wheel M about which and'a si'mi-i lar sprocket Wheel ,M, fixed to the crank The lowerend ofthe rod Q is fastenedto a shoe M which'ridesupon the cam'M keyed to the shaft M and which shaft carries ashaft and preferably of smaller diameter I thanthe sprocket wheel M, a sprocket chain M travels, forming a' means; for rotating the shaft M andthe cam ,which isukeyed thereto in a ratio of one revolution of the latter to ,two revolutions of thecrankshaft. 'A rodQ pivotally connects the two levers Q and., V and serves as a means for causing the same to be moved in unison with 'each other., a Y c Upon the opposite side ofthe cylinder of.

the engine. is an exhaust casing R which is similar in construction tothezcasing 'N and has two pipes R- and R which-"communicate with openings R and R formed; in

' the wall. of'the casing andthrough which the -engineis adapted to exhaust when utilized either as a tworor four cycle t e. A pisto'n valve rod R is adapted to havea rotary and longitudinal movement through" apertures R" and R at the bottom and top: 1 of the casing R, and a cylindrical sleeve valve 1 It is fixed to the rod R. A coiled spring R is mounted upon the rod R and bears m-" termediate the upper closed end of the sleeve vvalve R j and a plate R which is fixed to the upper end of the casing R and is apertured to allow the upper end of .the stem Rto pass freely therethrough. The lower end of the stem R has a shoe S'fixed thereto adapted to ride upon 'the cam Sv which latter is keyed to the shaft S journaled-in suitable bearings in the casing S and a sprocket wheel S is fixed to the shaft sprocketwheel S fixed to the shaft S and a similar sprocket wheel S fixed to the S and a sprocket chain S passes about said crank shaft D and preferably of half the :15 diameter of the sprocket wheel S; By this arrangement of varying the diameters of the sprocket wheels S and S, a similar ratio is-obtain'ed between the same as between the wheels M and M* before described. An

exit pipe W leads from the interior of the casing Rto the atmosphere.- Said sleeve valveR is provided-with the ports, designated respectivelyby letters P, P and P.

Said port P is adapted, when the sleeve R is in one position, to register with the opening R while the ;port P is adapted to register with the opening B when the sleeve valve is in anotherposition. The port P is designed to register with the pipe W to allowtheproducts of combustion to exhaust 5 to the atmosphere. The red R is adapted to be given an axial roclnngmotion'through the medium'of the lever V which is pivotally connected by the rod Q, with the lever Q". i

In operation, when the engine is adapted .to o'erate as-a two cycle, type, 'theeport- L in t e sleevevalveJ is'positioned'soas to" register with the ipe O and in which position-the fuel is a lowed to enter the sleeve valve through the pipe 0' and pass through 'i' the ports-L, 0 and I, which latter leads to and communicates with the crankcase. When the piston reaches its outer'liinit'andI uncovers theport I, the charge, which has been compressed within the crank casing, is allowed to-pass throughthe ports 1: andI' into the combustion chamber-where, upon the inner-throw of the piston, it is com pressed and exploded- The products of combustion-exhaust --through the port R? V into the sleeve: valve R thence to 'the at mosphere through the port P and pipe W.

It will" be understood that, when the piston B moves forward in the compressionjof the chargezandmloses the port I, the':-suction" 5 formed inwthe crank case will cause anewsupply of fuel tobe drawn throughth e pipe 0', sleeve-valved and port Tito the crank casing whereupon-the eutr thrsw jer the piston, it will be compressed inieadin'e'ss tojeo be delivered to the combustionchamber when the piston reaches its outer liniifand i guncovers again the port I.. Asthe pipeO f communicates with the manifold 'rhavnigfa check valve, it will be understood that the j 9 5 charge 5; will-1': be prevented from: returning throughthe-pipe O" from' 'the crankcasingi To'adapt thewengine' for the four-cycle 1 type, the'roperator merely actuates ther'od Q", causing thetwo sleeve valves J and R t0- i make a partial revolution, whichwill close 4 the ports Li and O and the po'rt P', bring- Q ing the 'ports L into registration with' the I pipes'Oand H and the port P into registration with the port RS thefport, P. being still ,5 i

in 'registrationwith the exhaust pipe W, In this adjustment of fthe engine, the charge t is admitted into the jlcombustion chamber,- compressed by thepiston, exploded and,' on,.'

the next inner throw ofthe piston, the prod ucts of combustion pass throughthe port R a into "the'sleeve valve R and thencethrough the port? and pipe W to the atmospherej 7 On the next outer throw of theIPistom-a'new charge is drawn in, compressed; and; ex'-,

ploded in thes'ame manner,thusfcompleting} ithe cyclejof the engine; v .Lj engine figi'fl rocating the exhaust valve, and connections between the latter and the means for rocking said stem, the oscillating movement of the valves being to adapt the same for use, when reciprocated, to cause the appa ratus to operate either as a two or four cycle engine, as set forth.

2. A convertible two or four cycle type engine comprising a cylinder, a piston therein, a crank shaft connected to the piston, a valve casing with fuel supply pipes leading thereto an passageways leading from the casing to the-interior of the engine cylinder, a ported sleeve valve rotatably and longitudinally movable within said casing, a stem upon which said valve is mounted, cam mechanism driven by the crank shaft for moving said stem, and a handle fixed to the stem and affording means for rocking the same, an exhaust chamber communicating with the engine cylinder, a ported sleeve valve mounted in the exhaust chamber, means for reciprocating the exhaust valve, and connections between the latter and the means for rocking said stem, the oscillating movement of the valves being toadapt the same for use, when reciprocated, to cause the apparatus to operate either as a two or four cycle engine, asset forth.

3. A convertible two or four cycle type engine comprising a cylinder, a piston therein, a crank shaft connected to the piston, a valve casing with fuel supply pipes leading thereto and passageways leading haust chamber communicating with the-engine cylinder, a ported sleeve valve mounted in the exhaust chamber, and means for reciprocat ng the., exhaust valve, and connectionsbetween the latter and the meansfor rocking said stem, the oscillating movement of the valves being to adapt the same for use,when

reciprocated, to cause the apparatus .to-nperate either as a two or four cycleoengine, as set forth.

4, A convertible two or four eyelet-type. "engine comprising a cylinder, a pistontherein, a crank shaft connected to the piston, :a

valve casing with fuel supply pipes leading.

thereto and, passageways leading from the casing to the interior of the engine cylinder, a ported sleeve valve rotatably and longitudinally movable within said .casing,-:a stem upon which said valve is mounted, said stem having a foot thereon, a cam and rotatable shaft upon which the same. is mounted adapted to contact with said foot to move the stem longitudinally, connections between the cam carrying and crank shafts, an exhaust chamber, a ported sleeve valve therein,

means for reciprocating the latter, connections between the exhaust chamber and the cylinder, and means for oscillating the inlet and exhaust valve, the oscillating'movement of the valvesbeing to adapt the same for use, when reciprocated, to cause the apparatus to operate either as a two or four cycle engine.

5. A convertible two or four cycle" type engine comprising a cylinder, a piston therein, a crank shaft connected to the piston, a

valve casing with'fuel supply pipes leading thereto and passageways leading from the casing to the interior of the engine cylinder,

a ported sleeve valve rotatably and longitudinally movable within said casing, a stem upon which said valve is mounted, said stem having a foot thereon, a cam and rotatable shaft upon which the same is mounted adapted to contact with said foot to move the stem'longitudinally, connections between the cam carrying and crank shafts, sprocket wheels upon said shafts, chain connections between the sprocket wheels, an exhaust chamber, a ported sleeve valve therein, means for reciprocating the latter, connections between the exhaust chamber and the cylinder, and means for oscillating the inlet and exhaust valves, the oscillating movement of the-valves being to adapt the same for use, when reciprocated,to cause the apparatus to operate either as a two or four cycle engine, as set forth.

6.- A convertible two or four cycle type engine comprising a cylinder, a piston therein, a crank shaft connected to the piston, a valve casing with fuel supply pipes leading thereto and passageways leading from the casing to the interior of the engine cylinder, a ported sleeve valve mounted within the easing and having apertured ends, a valve stem passing through said ends and the ends of the casing, an apertured plate fastened to one endof the casing, a coiled spring mounted upon the stem and passing through one end of the casin and bearing intermediate said plate and t e end of the valve, means for a longitudinal movement to the valve, 'a lever fixed to the stem for rocking the valve, an exhaust chamber, comm i. assageways between the same and ca 5 the'eyhnder of the engine, a ported sleeve valve in the exhaust chamber, means for V r v reelfirocating'said valve inlet,'and means for j ating said inlet and exhaust valves, the

oscillating movementof the valves being to signature inthe resenee of two witnesses.

EWIN LEWIS KEMPTNER. Witnesses: I

C. R. 'McKEAN, 'Lomsn 

